FIX: Deleting Users should work nicely with Reviewable Users

"Rejecting" a user in the queue is equivalent to deleting them, which
would then making it impossible to review rejected users. Now we store
information about the user in the payload so if they are deleted things
still display in the Rejected view.

Secondly, if a user is destroyed outside of the review queue, it will
now automatically "Reject" that queue item.

app/models/user.rb

@@ -1220,7 +1220,6 @@ class User < ActiveRecord::Base
     Jobs.enqueue(:create_user_reviewable, user_id: self.id)
   end
 
-
   protected
 
   def badge_grant